Measurement of AC losses in textured polycrystalline Bi-2212 thin rods

Author

Martinez, E. ; Hughes, T.J. ; Yang, Y. ; Beduz, C. ; Angurel, L.A.

Author_Institution

Inst. of Cryogenics, Southampton Univ., UK

Volume

9

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

805

Lastpage

808

Abstract

AC losses of textured polycrystalline Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/ thin rods carrying AC transport currents have been measured in self-field and in DC magnetic fields at 77 K. Measurements of the first and third harmonic of the voltage are presented. The current amplitude and frequency dependence of losses as well as the ratio between the different harmonics of the voltage is analysed. The results are compared with the losses calculated numerically for a superconductor characterised by power-law current-voltage dependence.

Keywords

bismuth compounds; calcium compounds; harmonics; high-temperature superconductors; loss measurement; strontium compounds; voltage measurement; 77 K; AC losses measurement; AC transport currents; Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8/; DC magnetic fields; current amplitude; first voltage harmonic measurement; high temperature superconductor; losses frequency dependence; power-law current-voltage dependence; self-field; textured polycrystalline Bi-2212 thin rods; textured polycrystalline Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+x/ thin rods; third voltage harmonic measurement; voltage harmonics ratio; Annealing; Contacts; Current measurement; Electrical resistance measurement; Frequency dependence; Harmonic analysis; Loss measurement; Magnetic field measurement; Silver; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.783419

Filename

783419